Answer :
A vector is an organism that transfers pathogens from one host to another. Vectors can be either living organisms such as insects, birds, and rodents, or non-living organisms such as wind, water, and soil.
Vector-borne diseases are those that are caused by pathogens that are transmitted from one host to another through the activity of a vector. Examples of vector-borne diseases include malaria, dengue fever, chikungunya, and Lyme disease. Vector-borne diseases are a major public health concern in many parts of the world.
Vectors can transmit pathogens in a variety of ways. For instance, mosquitoes are capable of transmitting diseases such as malaria and dengue fever through their saliva.
Rodents can transmit diseases such as plague and leptospirosis through their urine. In addition, vectors can spread pathogens through direct contact with infected hosts, such as through bites or scratches.
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